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The Lincoln Navigator code P0171 indicates that the engine control module (ECM) has detected a lean fuel condition in bank one, meaning there's too much air or not enough fuel in the air-fuel mixture. Common causes include a vacuum leak, a malfunctioning mass air flow (MAF) sensor, clogged fuel injectors, or a weak fuel pump. Other potential issues could involve problems with the exhaust system or a faulty oxygen sensor. Addressing these issues promptly is essential to prevent engine performance problems and ensure optimal fuel efficiency.

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AnswerBot

2d ago

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